/*
 * This software code is (c) 2010 T-Mobile USA, Inc. All Rights Reserved.
 *
 * Unauthorized redistribution or further use of this material is
 * prohibited without the express permission of T-Mobile USA, Inc. and
 * will be prosecuted to the fullest extent of the law.
 *
 * Removal or modification of these Terms and Conditions from the source
 * or binary code of this software is prohibited.  In the event that
 * redistribution of the source or binary code for this software is
 * approved by T-Mobile USA, Inc., these Terms and Conditions and the
 * above copyright notice must be reproduced in their entirety and in all
 * circumstances.
 *
 * No name or trademarks of T-Mobile USA, Inc., or of its parent company,
 * Deutsche Telekom AG or any Deutsche Telekom or T-Mobile entity, may be
 * used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" AND "WITH ALL FAULTS" BASIS
 * AND WITHOUT WARRANTIES OF ANY KIND.  ALL EXPRESS OR IMPLIED
 * CONDITIONS, REPRESENTATIONS OR WARRANTIES, INCLUDING ANY IMPLIED
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
 * NON-INFRINGEMENT CONCERNING THIS SOFTWARE, ITS SOURCE OR BINARY CODE
 * OR ANY DERIVATIVES THEREOF ARE HEREBY EXCLUDED.  T-MOBILE USA, INC.
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE
 * OR ITS DERIVATIVES.  IN NO EVENT WILL T-MOBILE USA, INC. OR ITS
 * LICENSORS BE LIABLE FOR LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES,
 * HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT
 * OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF T-MOBILE USA,
 * INC. HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * THESE TERMS AND CONDITIONS APPLY SOLELY AND EXCLUSIVELY TO THE USE,
 * MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE, ITS SOURCE OR BINARY
 * CODE OR ANY DERIVATIVES THEREOF, AND ARE SEPARATE FROM ANY WRITTEN
 * WARRANTY THAT MAY BE PROVIDED WITH A DEVICE YOU PURCHASE FROM T-MOBILE
 * USA, INC., AND TO THE EXTENT PERMITTED BY LAW.
 */

package javax.microedition.ims.core.sipservice;

import javax.microedition.ims.common.Logger;
import javax.microedition.ims.core.transaction.TransactionType;
import javax.microedition.ims.util.MessageUtilHolder;
import javax.microedition.ims.util.SipMessageUtil;

public enum ReferState {
    REFERENCE_RECEIVED,
    REFERENCE_DELIVERED,
    REFERENCE_TERMINATED,
    REFERENCE_DELIVERY_FAILED,
    NOTIFICATION_RECEIVED,
    NOTIFICATION_SENT,
    UNKNOWN;

    public static <T> ReferState toReferState(final TransactionStateChangeEvent<T> event) {
        ReferState retValue = UNKNOWN;
        Logger.log("SessionState", "toSessionState: " + event.getState());

        final TransactionType.Name transactionName = event.getTransaction().getTransactionType().getName();
        final State stateName = event.getState();
        final StateChangeReason reason = event.getStateChangeReason();
        final T message = event.getTriggeringMessage();
        final SipMessageUtil<T> sipMessageUtil = MessageUtilHolder.getSIPMessageUtil();

        switch (transactionName) {


            case SIP_REFER_CLIENT: {
                if (State.COMPLETED == stateName &&
                        StateChangeReason.INCOMING_MESSAGE == reason) {
                    if (sipMessageUtil.isSuccessResponse(message)) {
                        retValue = REFERENCE_DELIVERED;
                    }
                    else {
                        retValue = REFERENCE_DELIVERY_FAILED;
                    }
                }
                else {
                    retValue = null;
                }
            }
            break;

            case SIP_REFER_SERVER: {
                if (State.TRYING == stateName && StateChangeReason.INITIALIZATION == reason) {
                    retValue = REFERENCE_RECEIVED;
                }
                else {
                    retValue = null;
                }
            }
            break;

            case SIP_NOTIFY_CLIENT: {
                if (State.COMPLETED == stateName) {
                    retValue = NOTIFICATION_SENT;
                }
                else {
                    retValue = null;
                }
            }
            break;

            case SIP_NOTIFY_SERVER: {
                if (State.TRYING == stateName && StateChangeReason.INITIALIZATION == reason) {
                    retValue = NOTIFICATION_RECEIVED;
                }
                else {
                    retValue = null;
                }
            }
            break;
        }

        Logger.log("ReferState", "retValue: " + retValue);
        return retValue;
    }

}